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Exam 2

Respiratory Cardio Pulmonary A&P

QuestionAnswer
What is the formula for alveolar air equation? PAo2=(Pb-H20)FiO2-(PACo2 x 1.25)
What is the significance of alveolar air equation in respiratory therapy? It calculates the pressure of oxygen (PO2) in the alveoli.
Calculate the Normal for alveolar air equation? Pb=760,H20=47, Fio2 21%, PCo2 40mmhg. PAo2=(760-47).21-(40 x 1.25) 713 x .21 - 50 149.73-50 PAo2= 99.73 mmHg or 100 mmhg
What is the normal range for alveolar air equation, when Pb,Fio2,H20, Pco2 is in normal range 99.73 or 100 mmHg
What is the formula for A-a gradient? P(A-a)O2= PAo2-Pao2
PAo2 is calculated ____ Pressure of Oxygen in the alveoli
PaOs is a calculated_____ Pressure of oxygen in the arterial Blood
What is the pupose of the A-a gradient? to measure the difference between Alveolar and arterial PO2. The A-a gradient is use to measure if the therapy is improving the patient distribution. The portion of oxygen getting from the alveoli into the blood.
What normal ranges should the A-a gradient be on room air? The normal range for A-a gradient should be 5-10 mmHg on room air
If the patient is on 100% O2 what is the acceptable range for the A-a gradient? On 100% Oxygen the patient should have a difference no more than 65 mmHg
The A-a gradient on 100% O2 should be between what range? A-a gradient on 100% Oxygen should be between 25-65 mmHg on 100% Oxygen.
If the A-a gradient is between the ranges of 66-300 mmHg on 100 % O2 this reveal a problem of Ventillation and Perfusion Mismatch
If the A-a gradient is 300 mm Hg or greater on a 100% O2 this reveals a problem of ___ Shunting
CaO2 is also known as Arterial oxygen Content
CaO2 is used to determined The total oxygen content "delivered" to tissues or the best index oxygen transport. It measures the amount of oxygen bound to hemoglobin and the oxygen dissolved to plasma.
What is the formula for total arterial oxygen content aka Cao2 CaO2= (Hb x 1.34 x SaO2) + (PaO2 x 0.003)
What is the normal value for CaO2? The normal Value for CaO2 is 17-20 vol % or ml/dl.
Other than CaO2 you can also substitute what type fo venous blood to calculate the oxygen content Mixed Venous blood. CvO2= (Hb x 1.34 x SvO2) + (PvO2 x 0.003)
The normal range for Venous Oxygen content is ? 12-16 vol % or ml/dl.
When CvO2 decrease what other factors decrease Cardiac output
C(a-v) O2 is a formula to obtain ? Arterial venous oxygen content
What is the significance of C(a-v) o2 C(a-v)O2 is used to measure the oxygen "consumped" by the tissues.
What is the normal Value for C(a-v) O2 4-5 vol % or ml/dl.
what equation is used to calculate the cardiac output or oxygen consumption? Fick equation
What is the formula for Fick equation to determine the cardiac output? Qt= VO2 / C(a-v) O2 x 10
What is the fick equation to determine the oxygen consumption or VO2? VO2= Qt x C(a-v) O2 x 10
What is the normal values for Qt or cardiac output? 4-8 ml/min
What is the normal oxygen Consumption or VO2 250 ml/min
WHat is the normal value of shunt equation ? 3-5% shunt
What is the normal range for a/A ratio? 90% or 0.9 ratio
If PaO2 is known how do you find out the estimated SaO2 by adding 30 to Pao2
Why are blood gases obtained? ABG's are obtained to evaluate the acid/base status of the patient, their oxygenation status, and to assess the type of therapy.
Any chemical substance that is capable of releasing H+ solution. Acid
Any chemical substance that is capable of combining with an H+ solution Alkalosis
What type of equation is used to obtain a pH Henderson hessel bach
What side effects to the CNS is significant when pH is decreased or increased. Decrease pH =Central Nervous System will be Depressed- cause patient to be lethargic and coma. Increased pH= CNS will be over excited. ex, muscle spasm or respiratory failure.
What are the normal ranges for pH, PCO2, PaO2, HCO3. ph=7.35-7.45, PCO2=35-45, PaO2 80-10, HCO3 22-26
PaO2 varies with: Age, positioning, barometric pressure, and FiO2.
PaO2 is below predicted range for a patient breathing RA, regardless of FIO2 Hypoxemia
Indicates a condition in which tissue oxygenation is inadequate Hypoxia
Level of PaO2 is greater than 100 mmHg hyperoxia
What type of hypoxemia is present in the following ranges of PaO2 (blank)
Created by: baybiemoechelle
 

 



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